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Exciton lifetimes due to spontaneous emission in free space

Thilagam, A. (1998). Exciton lifetimes due to spontaneous emission in free space. Journal of Luminescence,79(4):249-255.

Document type: Journal Article
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Title Exciton lifetimes due to spontaneous emission in free space
Author Thilagam, A.
Journal Name Journal of Luminescence
Publication Date 1998
Volume Number 79
Issue Number 4
ISSN 0022-2313   (check CDU catalogue open catalogue search in new window)
Scopus ID 2-s2.0-0032202976
Start Page 249
End Page 255
Total Pages 7
Place of Publication Netherlands
Publisher Elsevier BV * North-Holland
Abstract The concept of fractional dimensional space is used to study the spontaneous emission lifetimes of excitons in quantum confined systems. We focus on a parameter α, a measure of dimensionality of the confined system and which is related to the exciton coherence volume. An analytical expression for the exciton spontaneous emission lifetime is derived and is used to calculate free exciton lifetimes in GaAs/A1 xGa 1-x As quantum wells for known values of α. Our results confirm that a minimum in the exciton lifetime occurs at a critical size of the well width (quantum well) or lateral width (quantum wire).
Keywords Exciton
Quantum well
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Created: Fri, 29 Aug 2014, 20:02:35 CST by Anthony Hornby